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Finding the Fourth Proportional to 664,728.80, 996,898.80 and 238,215.20

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Solution

The fourth proportional to 664,728.80, 996,898.80 and 238,215.20 is: 357,253.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,728.80 : 996,898.80 = 238,215.20 : x
  2. Step 2: Convert to fraction form
    664,728.80/996,898.80 = 238,215.20/x
  3. Step 3: Cross multiply
    664,728.80x = 996,898.80 × 238,215.20
  4. Step 4: Simplify right side
    664,728.80x = 237,476,447,021.76
  5. Step 5: Solve for x
    x = 237,476,447,021.76/664,728.80
  6. Step 6: Final answer
    x = 357,253.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.